Ahn Ki-yung <kyagrd@bawi.org> reports:
{Apparently inessential details of program supressed]
in unix/linux proper error msg comes out and back to interpreter.
ERROR - Control stack overflow
=========== but in windows 2000
Then suddnly interpreter fails and the red (X) popup window pops up.
hugs.exe - application programm error
unknown software exception (0xc000fd) ... blabla
This is a known problem in Hugs to do with overflows of the C stack. The problem is: - Hugs evaluation is done on the C stack and so some kinds of evaluation can cause stack overflows. - OSs and C are pretty poor at detecting or avoiding stack overflows. The reason you didn't see this in Unix is: - Unix apparently assigns a different stack-size limit to Hugs. (I think you can tune stack size in Windows but forget how.) - Hugs uses a 2nd stack 'the control stack' during evaluation. This is a normal C array which Hugs knows the size of so it can detect overflow in that stack. Often, when you run out of C stack space, you were about to run out of control stack space anyway and when you run out of control stack space you were about to run out of C stack space. (In other words, running out of either usually indicates a problem in your program which will not be solved by tweaking stack sizes.) Hope this helps. -- Alastair Reid reid@cs.utah.edu http://www.cs.utah.edu/~reid/